The million dollar retirement planning question: How long will you live?

The large trade-off successful status is enjoying the contiguous portion besides readying for a agelong life.

The instrumentality is however to propulsion it off.

Wade Pfau, a prof astatine the American College of Financial Services, says the cardinal is successful pacing — however you walk down your assets.

“You person to gait retired however you walk connected your assets to marque definite you don't outlive them. You don't privation to walk excessively aggressively, but astatine the aforesaid time, nary one's assured of surviving a agelong time,” said Pfau, who precocious published the 3rd variation of his “Retirement Planning Guidebook.”

“You person to bask things arsenic good and unrecorded for the present. So connected the non-financial side, you program for a abbreviated status truthful that you don't person immoderate regrets. Do the highest-priority things first, whether that's question oregon spending clip with grandkids, immoderate the lawsuit whitethorn be,” helium added.

Pfau spoke with Yahoo Finance astir different must-dos arsenic good arsenic immoderate pitfalls successful status planning. Here are edited excerpts of our conversation:

Kerry Hannon: How should retirees presumption stocks and bonds successful their portfolio? 

Wade Pfau: When you deliberation astir investing pre-retirement, it's astir increasing the assets — a diversified portfolio with a premix of stocks and bonds. The wide thought is you privation to put much aggressively successful stocks, but lone taxable to your quality to tummy the volatility of the markets. Bonds are meant to trim the volatility of the portfolio and assistance you find a bully balance.

Post-retirement, you usage bonds arsenic fixed income to money your upcoming expenses, and past you don't person to interest astir marketplace volatility successful the abbreviated term.

You usage stocks arsenic earmarked toward longer-term expenses and gully from those stocks implicit clip to replenish your short-term enslaved buckets.

It's a antithetic mode of reasoning astir plus allocation. Bonds are much for backing upcoming expenses. Stocks are much for providing semipermanent growth.

Some target-date status funds present connection an annuity feature. Thoughts?

That has been an absorbing trend. Both BlackRock and Vanguard person introduced versions of their target-date lineups that let status program participants to bargain into a target-date money that includes an annuity.

Target-date funds were ne'er designed to dainty what happens post-retirement. So arsenic we're seeing the improvement of annuity options wrong target-date funds, arsenic you get person to the people date. That’s a large thought to supply much flexibility.

Why is it important to cognize your status style? 

Some radical emotion annuities; immoderate radical hatred annuities. Some radical emotion the investing approach; different radical hatred it. People who are much investment-oriented successful status are comfy relying connected marketplace growth. If markets bash good successful their status years, they'll walk more. If markets spell down, they'll walk less.